A little-noticed provision tucked into the federal spending bill signed by President Trump could upend a booming industry — by banning many THC-infused products, like gummies, drinks, topical pain relief and vapes, now found everywhere from gas stations to wellness shops.

Hemp, a derivative of the cannabis plant, was legalized in the 2018 Farm Bill. It created a loophole for THC to be sold in low doses and explode in the mainstream consumer market.